Mutations that arise in nature, from no particular artificial agent, are called .

c. live where it’s cold and icy

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully